1983 C30 rear end is toast, need help

[hollywood_35]

Last summer I bought a 1983 3+3 C30 to steal the 454 and SM465 for my 81 shortbox. I didn't end up using it, but started to slowly fix the C30 instead. I just recently rebuilt the quadrajet, got it running, and went to hook up the driveshaft. It's been disconnected since I bought it. Well the pinion on the rear end is junk. It moves in and out a lot and has a ton of play. I was wondering if anyone has some resources or schematics to help me get this thing rebuilt. I know the proper thing to do would be to take it to a driveline shop to get it fixed up, but this truck is pretty much worthless at this point so I might as well just do it myself.